1.1 Pulping with Oxygen

Cláudia Esteves

Researcher

RISE

To contribute to more sustainable pulp and paper processes, finding alternative processes to liberate the fibers from the wood matrix is crucial and urgent. Oxygen delignification has several benefits to the industry, and recently, its interest has grown exponentially. In this work, a process was developed in which oxygen was directly applied to wood chips without any pre-treatment. This method resulted in significantly higher yields compared to traditional kraft cooking. The effects of various process conditions on the final yield and pulp properties were systematically investigated. The resulting pulp exhibited a high lignin content and was notably brighter than kraft pulp. The potential applications of this pulp were explored and will be presented.

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